package com.eryos.android.cigarettecounter.io;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;

import android.util.Log;

/**
 * Project : CigaretteCounter Author : Olivier Combe URL : http://eryos.fr/CigaretteCounter/
 * 
 * Copyright(C)2011 - Olivier Combe
 * 
 * Licensed under the Apache License, Version 2.0(the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 * 
 * @version \$Revision.*\$
 * @author Olivier Combe
 */
public class DataImporter extends IOStream {

    private InputStream is;
    private InputStreamReader isr;
    private BufferedReader br;

    /**
     * Default Constructor.
     * 
     * @param filenameArg
     *            to read
     */
    public DataImporter(final String filenameArg) {
        Log.d("CigaretteCounter", getClass().getSimpleName() + " : new DataImporter()");

        this.setExternalFilename(filenameArg);
    }

    /**
     * Open a stream.
     * 
     * @return true if the stream is correctly opened
     * @throws IOException
     *             in case of error
     */
    public boolean openStream() throws IOException {
        Log.d("CigaretteCounter", getClass().getSimpleName() + " : openStream");
        if (this.openStream(TYPE.READ)) {

            is = new FileInputStream(getOutputFile());
            isr = new InputStreamReader(is);
            br = new BufferedReader(isr);

            return true;
        } else {
            return false;
        }
    }

    /**
     * Read data from file in /sdcard/downloads directory.
     * 
     * @return Data as list
     * @throws IOException
     *             in case of error
     */
    public ArrayList<String> readDataFromExternalFile() throws IOException {
        Log.d("CigaretteCounter", getClass().getSimpleName() + " : readDataFromExternalFile");

        ArrayList<String> data = new ArrayList<String>();

        String line = br.readLine();

        while (line != null) {
            data.add(line);
            line = br.readLine();
        }

        return data;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void closeStream() throws IOException {
        Log.d("CigaretteCounter", getClass().getSimpleName() + " : closeStream");

        is.close();
        isr.close();
        br.close();
    }

}
